Lighting device

Abstract

The present invention provides a lighting device that suppresses the difference in light intensity between a confluence region where light converges and other non-confluence regions. [Solution] The lighting device 1 is generally configured to include a main light body 2 having a long shape that propagates the first light 40 output from the main light source 4 and outputs it from the main output surface 24 toward the object to be illuminated 10, at least one sub-light guide 3 that propagates the second light 50 output from the sub-light source 5, and a merging region 30 in which the main light body 2 and the sub-light guide 3 are connected, and the amount of superimposed light obtained by the merging of the first light 40 and the second light 50 is reduced and output from the merging output surface 36 toward the object to be illuminated 10.

Claims

1. A leading light source having a long shape, which propagates the first light output from the main light source and outputs it from the main output surface toward the object to be illuminated, A secondary light guide that propagates the second light output from the secondary light source, A confluence region in which the leading light source and the secondary light source are connected, the first light and the second light source merge and superimpose, reducing the amount of superimposed light and outputting it from the confluence output surface toward the object to be illuminated, A lighting device equipped with this.

2. The confluence region has a confluence reflecting surface that faces the confluence output surface and reflects the superimposed light toward the confluence output surface, The merging output surface is composed of a first surface that directs a portion of the reflected light reflected by the merging reflection surface toward the object to be illuminated, and a second surface that directs at least the remaining portion of the reflected light toward a direction different from the object to be illuminated. The lighting device according to claim 1.

3. The main outer surface of the non-merging region of the primary light source, where the second light does not merge, is smoothly connected to the outer surface of the merging region. The lighting device according to claim 2.

4. The first surface has a first outer edge in the cross-section in the short direction that is arc-shaped, The second surface has a shape in which the second outer edge of the cross-section in the short direction has at least one vertex, including a vertex formed between it and an adjacent surface different from the first surface. The lighting device according to claim 3.

5. The non-converging region has a shape in which the first periphery of the cross-section in the short direction has n vertices (where n is an integer of 1 or more), The aforementioned confluence region has a polygonal shape in which the second periphery of the cross-section in the short direction has n+1 or more vertices. The lighting device according to claim 3.

6. The object to be illuminated is the door trim of the vehicle. The first light is focused and output from the main output surface of the leading light body, reflects off the door trim and reaches the occupant's eye point. A portion of the superimposed light is emitted from the confluence output surface of the confluence region, reflects off the door trim, and reaches the occupant's eye point. The lighting device according to any one of claims 2 to 5.

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